All categories

3 years ago

.5 moles of sodium chloride is dissolved in 2 L of water. What is the molarity of the solution

Chemistry

1 answer:

suter [353]3 years ago

8 0

Answer:

its ,5

Explanation:

i just did it :)

You might be interested in

A catalyst works by(1) increasing the potential energy of the reactants(2) increasing the energy released during a reaction(3) d

valentina_108 [34]

The catalyst (4) decreases the activation energy required for a reaction, by holding reactants in place

7 0

3 years ago

Read 2 more answers

What is the result when earth layers experience extension stress? Question 2 options:

Vika [28.1K]

Answer:

stretching and thinning of the Earth's crust occurs.

Explanation:

The result of the extension stress on Earth layers is the stretching and thinning of the Earth's crust occurs.

When there is a stress on the Earth's layers, the Earth's crust experiences the phenomena of stretching and thinning.

4 0

3 years ago

Explain how you would decide which represents a greater mass: 3.25 x 1022 atoms of Ca or 2.45 grams of Mg?

elena55 [62]

Answer:

You need to convert the number of atoms of Ca into mass in grams, using Avogadro's number and the atomic mass of Ca.

Explanation:

The amount of matter is measured in grams. Thus, you need to convert the number of atoms of Ca (calcium) into mass to compare with 2.45 grams of Mg.

To convert the atoms of calcium into mass, you divide by Avogadro's number, to obtain the number of moles of atoms, and then divide by the atomic mass of calcium.

1. Number of moles, n

$n=\dfrac{\text{number of atoms}}{\text{Avogadro's number}}\\ \\ \\ n=\dfrac{3.25\times 10^{22}}{6.022\times 10^{23}}=0.053969mol$

2. Mass

mass = number of moles × atomic mass

mass = 0.053969mol × 40.078g/mol = 2.16g

Then, 2.45 g of Mg represent a greaer mass than the 3.25 × 10²² atoms of Ca.

4 0

3 years ago

Calculate number of moles of 4.4g of CO2 and 5.6L of NH3 . Pls help . Its urgent

kupik [55]

Moles of CO₂ = mass / molecular weight
Moles of CO₂ = 4.4 / (12 + 16 x 2)
Moles of CO₂ = 0.1 mol

Each mole of gas occupies 22.4 L at STP. Therefore,
Moles of NH₃ = 5.6 / 22.4
Moles of NH₃ = 0.25 mol

4 0

4 years ago

Which isotope is most commonly used in the radioactive dating of the remains of organic materials?

Zarrin [17]

(1) 14C also known as Carbon-14, is used to radio-date organic materials as well as earth materials.

8 0

3 years ago